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US7642378B2 - Lipid lowering biphenylcarboxamides - Google Patents

Lipid lowering biphenylcarboxamides Download PDF

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US7642378B2
US7642378B2 US10/474,281 US47428102A US7642378B2 US 7642378 B2 US7642378 B2 US 7642378B2 US 47428102 A US47428102 A US 47428102A US 7642378 B2 US7642378 B2 US 7642378B2
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Lieven Meerpoel
Marcel Viellevoye
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Janssen Pharmaceutica NV
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    • C07D295/04—Heterocyclic compounds containing polymethylene-imine rings with at least five ring members, 3-azabicyclo [3.2.2] nonane, piperazine, morpholine or thiomorpholine rings, having only hydrogen atoms directly attached to the ring carbon atoms with substituted hydrocarbon radicals attached to ring nitrogen atoms
    • C07D295/14—Heterocyclic compounds containing polymethylene-imine rings with at least five ring members, 3-azabicyclo [3.2.2] nonane, piperazine, morpholine or thiomorpholine rings, having only hydrogen atoms directly attached to the ring carbon atoms with substituted hydrocarbon radicals attached to ring nitrogen atoms substituted by carbon atoms having three bonds to hetero atoms with at the most one bond to halogen, e.g. ester or nitrile radicals
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    • C07D295/04—Heterocyclic compounds containing polymethylene-imine rings with at least five ring members, 3-azabicyclo [3.2.2] nonane, piperazine, morpholine or thiomorpholine rings, having only hydrogen atoms directly attached to the ring carbon atoms with substituted hydrocarbon radicals attached to ring nitrogen atoms
    • C07D295/14—Heterocyclic compounds containing polymethylene-imine rings with at least five ring members, 3-azabicyclo [3.2.2] nonane, piperazine, morpholine or thiomorpholine rings, having only hydrogen atoms directly attached to the ring carbon atoms with substituted hydrocarbon radicals attached to ring nitrogen atoms substituted by carbon atoms having three bonds to hetero atoms with at the most one bond to halogen, e.g. ester or nitrile radicals
    • C07D295/145—Heterocyclic compounds containing polymethylene-imine rings with at least five ring members, 3-azabicyclo [3.2.2] nonane, piperazine, morpholine or thiomorpholine rings, having only hydrogen atoms directly attached to the ring carbon atoms with substituted hydrocarbon radicals attached to ring nitrogen atoms substituted by carbon atoms having three bonds to hetero atoms with at the most one bond to halogen, e.g. ester or nitrile radicals with the ring nitrogen atoms and the carbon atoms with three bonds to hetero atoms attached to the same carbon chain, which is not interrupted by carbocyclic rings
    • C07D295/15—Heterocyclic compounds containing polymethylene-imine rings with at least five ring members, 3-azabicyclo [3.2.2] nonane, piperazine, morpholine or thiomorpholine rings, having only hydrogen atoms directly attached to the ring carbon atoms with substituted hydrocarbon radicals attached to ring nitrogen atoms substituted by carbon atoms having three bonds to hetero atoms with at the most one bond to halogen, e.g. ester or nitrile radicals with the ring nitrogen atoms and the carbon atoms with three bonds to hetero atoms attached to the same carbon chain, which is not interrupted by carbocyclic rings to an acyclic saturated chain
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    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
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    • A61P3/00—Drugs for disorders of the metabolism
    • A61P3/06—Antihyperlipidemics
    • A—HUMAN NECESSITIES
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    • A61P3/00—Drugs for disorders of the metabolism
    • A61P3/08—Drugs for disorders of the metabolism for glucose homeostasis
    • A61P3/10—Drugs for disorders of the metabolism for glucose homeostasis for hyperglycaemia, e.g. antidiabetics
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61P—SPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
    • A61P9/00—Drugs for disorders of the cardiovascular system
    • A61P9/10—Drugs for disorders of the cardiovascular system for treating ischaemic or atherosclerotic diseases, e.g. antianginal drugs, coronary vasodilators, drugs for myocardial infarction, retinopathy, cerebrovascula insufficiency, renal arteriosclerosis
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    • C07D—HETEROCYCLIC COMPOUNDS
    • C07D211/00—Heterocyclic compounds containing hydrogenated pyridine rings, not condensed with other rings
    • C07D211/04—Heterocyclic compounds containing hydrogenated pyridine rings, not condensed with other rings with only hydrogen or carbon atoms directly attached to the ring nitrogen atom
    • C07D211/06—Heterocyclic compounds containing hydrogenated pyridine rings, not condensed with other rings with only hydrogen or carbon atoms directly attached to the ring nitrogen atom having no double bonds between ring members or between ring members and non-ring members
    • C07D211/08—Heterocyclic compounds containing hydrogenated pyridine rings, not condensed with other rings with only hydrogen or carbon atoms directly attached to the ring nitrogen atom having no double bonds between ring members or between ring members and non-ring members with hydrocarbon or substituted hydrocarbon radicals directly attached to ring carbon atoms
    • C07D211/18—Heterocyclic compounds containing hydrogenated pyridine rings, not condensed with other rings with only hydrogen or carbon atoms directly attached to the ring nitrogen atom having no double bonds between ring members or between ring members and non-ring members with hydrocarbon or substituted hydrocarbon radicals directly attached to ring carbon atoms with substituted hydrocarbon radicals attached to ring carbon atoms
    • C07D211/26—Heterocyclic compounds containing hydrogenated pyridine rings, not condensed with other rings with only hydrogen or carbon atoms directly attached to the ring nitrogen atom having no double bonds between ring members or between ring members and non-ring members with hydrocarbon or substituted hydrocarbon radicals directly attached to ring carbon atoms with substituted hydrocarbon radicals attached to ring carbon atoms with hydrocarbon radicals, substituted by nitrogen atoms
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    • C07—ORGANIC CHEMISTRY
    • C07D—HETEROCYCLIC COMPOUNDS
    • C07D211/00—Heterocyclic compounds containing hydrogenated pyridine rings, not condensed with other rings
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    • C07D211/06—Heterocyclic compounds containing hydrogenated pyridine rings, not condensed with other rings with only hydrogen or carbon atoms directly attached to the ring nitrogen atom having no double bonds between ring members or between ring members and non-ring members
    • C07D211/08—Heterocyclic compounds containing hydrogenated pyridine rings, not condensed with other rings with only hydrogen or carbon atoms directly attached to the ring nitrogen atom having no double bonds between ring members or between ring members and non-ring members with hydrocarbon or substituted hydrocarbon radicals directly attached to ring carbon atoms
    • C07D211/18—Heterocyclic compounds containing hydrogenated pyridine rings, not condensed with other rings with only hydrogen or carbon atoms directly attached to the ring nitrogen atom having no double bonds between ring members or between ring members and non-ring members with hydrocarbon or substituted hydrocarbon radicals directly attached to ring carbon atoms with substituted hydrocarbon radicals attached to ring carbon atoms
    • C07D211/34—Heterocyclic compounds containing hydrogenated pyridine rings, not condensed with other rings with only hydrogen or carbon atoms directly attached to the ring nitrogen atom having no double bonds between ring members or between ring members and non-ring members with hydrocarbon or substituted hydrocarbon radicals directly attached to ring carbon atoms with substituted hydrocarbon radicals attached to ring carbon atoms with hydrocarbon radicals, substituted by carbon atoms having three bonds to hetero atoms with at the most one bond to halogen, e.g. ester or nitrile radicals
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    • C07D—HETEROCYCLIC COMPOUNDS
    • C07D211/00—Heterocyclic compounds containing hydrogenated pyridine rings, not condensed with other rings
    • C07D211/04—Heterocyclic compounds containing hydrogenated pyridine rings, not condensed with other rings with only hydrogen or carbon atoms directly attached to the ring nitrogen atom
    • C07D211/68—Heterocyclic compounds containing hydrogenated pyridine rings, not condensed with other rings with only hydrogen or carbon atoms directly attached to the ring nitrogen atom having one double bond between ring members or between a ring member and a non-ring member
    • C07D211/70—Heterocyclic compounds containing hydrogenated pyridine rings, not condensed with other rings with only hydrogen or carbon atoms directly attached to the ring nitrogen atom having one double bond between ring members or between a ring member and a non-ring member with only hydrogen atoms, hydrocarbon or substituted hydrocarbon radicals, directly attached to ring carbon atoms
    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07D—HETEROCYCLIC COMPOUNDS
    • C07D401/00—Heterocyclic compounds containing two or more hetero rings, having nitrogen atoms as the only ring hetero atoms, at least one ring being a six-membered ring with only one nitrogen atom
    • C07D401/02—Heterocyclic compounds containing two or more hetero rings, having nitrogen atoms as the only ring hetero atoms, at least one ring being a six-membered ring with only one nitrogen atom containing two hetero rings
    • C07D401/12—Heterocyclic compounds containing two or more hetero rings, having nitrogen atoms as the only ring hetero atoms, at least one ring being a six-membered ring with only one nitrogen atom containing two hetero rings linked by a chain containing hetero atoms as chain links
    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07D—HETEROCYCLIC COMPOUNDS
    • C07D405/00—Heterocyclic compounds containing both one or more hetero rings having oxygen atoms as the only ring hetero atoms, and one or more rings having nitrogen as the only ring hetero atom
    • C07D405/02—Heterocyclic compounds containing both one or more hetero rings having oxygen atoms as the only ring hetero atoms, and one or more rings having nitrogen as the only ring hetero atom containing two hetero rings
    • C07D405/12—Heterocyclic compounds containing both one or more hetero rings having oxygen atoms as the only ring hetero atoms, and one or more rings having nitrogen as the only ring hetero atom containing two hetero rings linked by a chain containing hetero atoms as chain links
    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07K—PEPTIDES
    • C07K5/00—Peptides containing up to four amino acids in a fully defined sequence; Derivatives thereof
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    • C07K5/06—Dipeptides
    • C07K5/06191—Dipeptides containing heteroatoms different from O, S, or N
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
    • A61K38/00—Medicinal preparations containing peptides

Definitions

  • the present invention is concerned with novel biphenylcarboxamide compounds having apolipoprotein B inhibiting activity and concomitant lipid lowering activity.
  • the invention further relates to methods for preparing such compounds, pharmaceutical compositions comprising said compounds as well as the use of said compounds as a medicine for the treatment of hyperlipidemia, obesity and type II diabetes.
  • Obesity is the cause of a myriad of serious health problems like the adult onset of diabetes and heart disease.
  • the loss of weight is getting an obsession among an increasing proportion of the human population.
  • LDL low density lipoproteins
  • VLDL very low density lipoproteins
  • Drugs primarily used for the management of hyperlipidemia include bile acid sequestrant resins such as cholestyramine and colestipol, fibric acid derivatives such as bezafibrate, clofibrate, fenofibrate, ciprofibrate and gemfibrozil, nicotinic acid and cholesterol synthesis inhibitors such as HMG Co-enzyme-A reductase inhibitors.
  • bile acid sequestrant resins such as cholestyramine and colestipol
  • fibric acid derivatives such as bezafibrate, clofibrate, fenofibrate, ciprofibrate and gemfibrozil
  • nicotinic acid and cholesterol synthesis inhibitors such as HMG Co-enzyme-A reductase inhibitors.
  • Fibric acid derivatives induce a moderate decrease (by 5 to 25%) of LDL cholesterol (except in hypertriglyceridemic patients in whom initially low levels tend to increase) and, although usually well tolerated, suffer from side-effects including potentiation of warfarine, pruritus, fatigue, headache, insomnia, painful reversible myopathy and stiffness in large muscle groups, impotency and impaired renal function.
  • Nicotinic acid is a potent lipid lowering agent resulting in a 15 to 40% decrease in LDL cholesterol (and even 45 to 60% when combined with a bile acid sequestrant resin) but with a high incidence of troublesome side-effects related to the drug's associated vasodilatory action, such as headache, flushing, palpitations, tachychardia and occasional syncopes, as well as other side-effects such as gastro-intestinal discomfort, hyperucemia and impairment of glucose tolerance.
  • lovastatin and simvastatin are both inactive prodrugs containing a lactone ring which is hydrolyzed in the liver to form the corresponding active hydroxy-acid derivative. Inducing a reduction of LDL cholesterol by 35 to 45%, they are generally well tolerated with a low incidence of minor side effects. However there still remains a need for new lipid lowering agents with improved efficiency and/or acting via other mechanisms than the above mentioned drugs.
  • Plasma lipoproteins are water-soluble complexes of high molecular weight formed from lipids (cholesterol, triglyceride, phospholipids) and apolipoproteins.
  • lipids cholesterol, triglyceride, phospholipids
  • apolipoproteins lipids (cholesterol, triglyceride, phospholipids) and apolipoproteins.
  • IDL intermediate density lipoproteins
  • HDL high density lipoproteins
  • chylomicrons Ten major human plasma apolipoproteins
  • VLDL which is secreted by the liver and contains apolipoprotein B (hereinafter referred as Apo-B), undergoes degradation to LDL which transports 60 to 70% of the total serum cholesterol.
  • Apo-B is also the main protein component of LDL.
  • high density lipoproteins hereinafter referred as HDL
  • HDL high density lipoproteins
  • the HDL/LDL ratio is thus a convenient method of assessing the atherogenic potential of an individual's plasma lipid profile.
  • apolipoprotein (apo) B apolipoprotein (apo) B, apo B-48 and apo B-100
  • Apo B-48 so named because it appears to be about 48% the size of apo B-100 on sodium dodecyl sulfate-polyacrylamide gels, is synthesized by the intestine in humans.
  • Apo B-48 is necessary for the assembly of chylomicrons and therefore has an obligatory role in the intestinal absorption of dietary fats.
  • Apo B-100 which is produced in the liver in humans, is required for the synthesis and secretion of VLDL.
  • LDL which contain about 2 ⁇ 3 of the cholesterol in human plasma, are metabolic products of VLDL.
  • Apo B-100 is virtually the only protein component of LDL. Elevated concentrations of apo B-100 and LDL cholesterol in plasma are recognized risk factors for developing atherosclerotic coronary artery disease.
  • hyperlipidemia A large number of genetic and acquired diseases can result in hyperlipidemia. They can be classified into primary and secondary hyperlipidemic states. The most common causes of the secondary hyperlipidemias are diabetes mellitus, alcohol abuse, drugs, hypothyroidism, chronic renal failure, nephrotic syndrome, cholestasis and bulimia.
  • hyperlipidemias have also been classified into common hypercholesterolaemia, familial combined hyperlipidaemia, familial hypercholesterolaemia, remnant hyperlipidaemia, chylomicronaemia syndrome and familial hyper-triglyceridaemia.
  • Microsomal triglyceride transfer protein (hereinafter referred as MTP) is known to catalyze the transport of triglyceride and cholesteryl ester by preference to phospholipids such as phosphatidylcholine. It was demonstrated by D. Sharp et al., Nature (1993) 365:65 that the defect causing abetalipoproteinemia is in the MTP gene. This indicates that MTP is required for the synthesis of Apo B-containing lipoproteins such as VLDL, the precursor to LDL. It therefore follows that an MTP inhibitor would inhibit the synthesis of VLDL and LDL, thereby lowering levels of VLDL, LDL, cholesterol and triglyceride in humans.
  • MTP Microsomal triglyceride transfer protein
  • MTP inhibitors have been reported in Canadian patent application No. 2,091,102 and in WO 96/26205. MTP inhibitors belonging to the class of polyarylcarboxamides have also been reported in U.S. Pat. No. 5,760,246 as well as in WO-96/40640 and WO-98/27979.
  • One of the goals of the present invention is to provide an improved treatment for patients suffering from obesity or atherosclerosis, especially coronary atherosclerosis and more generally from disorders which are related to atherosclerosis, such as ischaemic heart disease, peripheral vascular disease and cerebral vascular disease.
  • Another goal of the present invention is to cause regression of atherosclerosis and inhibit its clinical consequences, particularly morbidity and mortality.
  • the present invention is based on the unexpected discovery that a class of novel biphenylcarboxamide compounds is acting as selective MTP inhibitors, i.e. is able to selectively block MTP at the level of the gut wall in mammals, and is therefore a promising candidate as a medicine, namely for the treatment of hyperlipidemia.
  • the present invention additionally provides several methods for preparing such biphenylcarboxamide compounds, as well as pharmaceutical compositions including such compounds.
  • the invention provides a certain number of novel compounds which are useful intermediates for the preparation of the therapeutically active biphenylcarboxamide compounds, as well as methods for preparing such intermediates.
  • the invention provides a method of treatment of a condition selected from atherosclerosis, pancreatitis, obesity, hypercholesterolemia, hypertriglyceridemia, hyperlipidemia, diabetes and type II diabetes, comprising administering a therapeutically active biphenylcarboxamide compound to a mammal.
  • the present invention relates to a family of novel compounds of formula (I)
  • Examples of the bivalent radical Z of formula (a-1) wherein one of X 1 or X 2 represents an sp 2 hybridized carbon atom are:
  • the pharmaceutically acceptable acid addition salts as mentioned hereinabove are meant to comprise the therapeutically active non-toxic acid addition salt forms which the compounds of formula (I) are able to form.
  • the pharmaceutically acceptable acid addition salts can conveniently be obtained by treating the base form with such appropriate acid.
  • Appropriate acids comprise, for example, inorganic acids such as hydrohalic acids, e.g. hydrochloric or hydrobromic acid, sulfuric, nitric, phosphoric and the like acids; or organic acids such as, for example, acetic, propanoic, hydroxyacetic, lactic, pyruvic, oxalic (i.e. ethanedioic), malonic, succinic (i.e.
  • butanedioic acid maleic, fumaric, malic, tartaric, citric, methanesulfonic, ethanesulfonic, benzenesulfonic, p-toluenesulfonic, cyclamic, salicylic, p-aminosalicylic, pamoic and the like acids.
  • salt forms can be converted by treatment with an appropriate base into the free base form.
  • addition salt as used hereinabove also comprises the solvates which the compounds of formula (I) as well as the salts thereof, are able to form.
  • solvates are for example hydrates, alcoholates and the like.
  • N-oxide forms of the compounds of formula (I), which may be prepared in art-known manners, are meant to comprise those compounds of formula (I) wherein a nitrogen atom is oxidized to the N-oxide.
  • stereochemically isomeric forms as used hereinbefore defines all the possible isomeric forms which the compounds of formula (I) may possess.
  • chemical designation of compounds denotes the mixture of all possible stereochemically isomeric forms, said mixtures containing all diastereomers and enantiomers of the basic molecular structure. More in particular, stereogenic centers may have the R- or S-configuration; substituents on bivalent cyclic (partially) saturated radicals may have either the cis- or trans-configuration.
  • the chemical designation of compounds denotes the mixture of all possible stereoisomeric forms, said mixtures containing all diastereomers and enantiomers of the basic molecular structure. The same applies to the intermediates as described herein, used to prepare end products of formula (I).
  • a group of interesting compounds consists of those compounds of formula (I) wherein one or more of the following restrictions apply:
  • a particular group of compounds are those compounds of formula (I) wherein the bivalent radical A represents a methylene group substituted with phenyl.
  • Another particular group of compounds are those compounds of formula (I) wherein Z is a bivalent radical of formula (a-5) wherein Z 1 and Z 2 represent CH 2 CH 2 and X 1 is N and X 2 is CH.
  • Yet another particular group of compounds are those compounds of formula (I) wherein Z is a bivalent radical of formula (a-5) wherein Z 1 and Z 2 represent CH 2 CH 2 and X 1 is CH and X 2 is N.
  • Still another particular group of compounds are those compounds of formula (I) wherein Z is a bivalent radical of formula (a-5) wherein Z 1 and Z 2 represent CH 2 CH 2 and X 1 and X 2 are N.
  • a first process for preparing a biphenylcarboxamide compound according to this invention is a process wherein an intermediate phenylene amine having the formula
  • R 1 and R 2 are as defined in formula (I) and Q 1 is selected from hydroxy and halo, in at least one reaction-inert solvent and optionally in the presence of a suitable base, the said process further optionally comprising converting a compound of formula (I) into an addition salt thereof, and/or preparing stereochemically isomeric forms thereof.
  • Q 1 is hydroxy, it may be convenient to activate the biphenylcarboxylic acid of formula (III) by adding an effective amount of a reaction promoter.
  • Non-limiting examples of such reaction promoters include carbonyldiimidazole, diimides such as N,N′-dicyclohexylcarbodiimide or 1-(3-dimethylaminopropyl)-3-ethylcarbodiimide, and functional derivatives thereof.
  • a polar aprotic solvent such as, for instance, methylene chloride.
  • Suitable bases for carrying out this first process include tertiary amines such as triethylamine, triisopropylamine and the like.
  • Suitable temperatures for carrying out the first process of the invention typically range from about 20° C. to about 140° C., depending on the particular solvent used, and will most often be the boiling temperature of the said solvent.
  • a second process for preparing a biphenylcarboxamide compound of the invention is a process wherein an intermediate having the formula (IV)
  • R 1 , R 2 , R 3 , R 4 , A and Z are as defined in formula (I) and Q 2 is selected from halo and hydroxy, is reacted with an intermediate (V) of the formula B-H in at least one reaction-inert solvent and optionally in the presence of at least one suitable coupling reagent and/or a suitable base, the said process further optionally comprising converting a compound of formula (I) into an addition salt thereof, and/or preparing stereochemically isomeric forms thereof.
  • Q 2 is hydroxy, it may be convenient to activate the carboxylic acid of formula (IV) by adding an effective amount of a reaction promoter.
  • a fast and enantiomerization-free reaction of the intermediate of formula (IV) with the said intermediate (V) may be performed in the further presence of an effective amount of a compound such as hydroxybenzotriazole, benzotriazolyloxytris(dimethylamino)phosphonium hexafluorophosphate, tetrapyrrolidinophosphonium hexafluorophosphate, bromotripyrrolidinophosphonium hexafluorophosphate, or a functional derivative thereof, such as disclosed by D. Hudson, J. Org. Chem . (1988), 53:617.
  • a compound such as hydroxybenzotriazole, benzotriazolyloxytris(dimethylamino)phosphonium hexafluorophosphate, tetrapyrrolidinophosphonium hexafluorophosphate, bromotripyrrolidinophosphonium hexafluorophosphate, or a functional derivative thereof
  • a third process for preparing a biphenylcarboxamide compound according to this invention is a process wherein an intermediate having the formula (VI)
  • R 1 , R 2 , R 3 , and R 4 are as defined in formula (I) and Q 3 is selected from halo, B(OH) 2 , alkylboronates and cyclic analogues thereof, is reacted with a reactant having the formula (VII)
  • B, A and Z are as defined in formula (I), in at least one reaction-inert solvent and optionally in the presence of at least one transition metal coupling reagent and/or at least one suitable ligand, the said process further optionally comprising converting a compound of formula (I) into an addition salt thereof, and/or preparing stereochemically isomeric forms thereof.
  • This type of reaction being known in the art as the Buchwaldt reaction, reference to the applicable metal coupling reagents and/or suitable ligands, e.g.
  • R 1 , R 2 , R 3 , R 4 , A, B, and Z are as defined for compounds of formula (I).
  • PG represents a protecting group such as, e.g. t-butoxycarbonyl, C 1-6 alkyloxycarbonyl, phenylmethyloxycarbonyl, Fmoc and the like.
  • the compounds of formula (I) as prepared in the hereinabove described processes may be synthesized in the form of racemic mixtures of enantiomers which can be separated from one another following art-known resolution procedures.
  • the racemic compounds of formula (I) may be converted into the corresponding diastereomeric salt forms by reaction with a suitable chiral acid. Said diastereomeric salt forms are subsequently separated, for example, by selective or fractional crystallization and the enantiomers are liberated therefrom by alkali.
  • An alternative manner of separating the enantiomeric forms of the compounds of formula (I) involves liquid chromatography using a chiral stationary phase.
  • Said pure stereochemically isomeric forms may also be derived from the corresponding pure stereochemically isomeric forms of the appropriate starting materials, provided that the reaction occurs stereospecifically.
  • said compound will be synthesized by stereospecific methods of preparation. These methods will advantageously employ enantiomerically pure starting materials.
  • the present compounds may be used for the manufacture of a medicine for treating disorders caused by an excess of very low density lipoproteins (VLDL) or low density lipoproteins (LDL), and especially disorders caused by the cholesterol associated with said VLDL and LDL.
  • VLDL very low density lipoproteins
  • LDL low density lipoproteins
  • VLDL low density lipoproteins
  • VLDL very low density lipoproteins
  • apo-B apolipoprotein B
  • LDL low density lipoproteins
  • Apo-B apolipoprotein B
  • high density lipoproteins (HDL) which contain apolipoprotein A1, have a protective effect and are inversely correlated with risk of coronary heart disease.
  • the HDL/LDL ratio is thus a convenient method of assessing the atherogenic potential of an individual's plasma lipid profile.
  • the principal mechanism of action of the compounds of formula (I) appears to involve inhibition of MTP (microsomial triglyceride transfer protein) activity in hepatocytes and intestinal epithelial cells, resulting in decreased VLDL and chylomicron production, respectively.
  • MTP microsomial triglyceride transfer protein
  • This is a novel and innovative approach to hyperlipidemia, and is expected to lower LDL-cholesterol and triglycerides through reduced hepatic production of VLDL and intestinal production of chylomicrons.
  • the present compounds may also be used to prevent or treat patients suffering from obesitas or from atherosclerosis, especially coronary atherosclerosis and more in general disorders which are related to atherosclerosis, such as ischaemic heart disease, peripheral vascular disease, cerebral vascular disease.
  • the present compounds may cause regression of atherosclerosis and inhibit the clinical consequences of atherosclerosis, particularly morbidity and mortality.
  • the present invention also provides a method of treating warm-blooded animals, including humans, (generally called herein patients) suffering from disorders caused by an excess of very low density lipoproteins (VLDL) or low density lipoproteins (LDL), and especially disorders caused by the cholesterol associated with said VLDL and LDL. Consequently a method of treatment is provided for relieving patients suffering from conditions, such as, for example, hyperlipidemia, obesity, atherosclerosis or type II diabetes.
  • VLDL very low density lipoproteins
  • LDL low density lipoproteins
  • compositions comprising at least one pharmaceutically acceptable carrier and a therapeutically effective amount of a biphenylcarboxamide compound having the formula (I).
  • any of the usual liquid pharmaceutical carriers may be employed, such as for instance water, glycols, oils, alcohols and the like in the case of oral liquid preparations such as suspensions, syrups, elixirs and solutions; or solid pharmaceutical carriers such as starches, sugars, kaolin, lubricants, binders, disintegrating agents and the like in the case of powders, pills, capsules and tablets. Because of their easy administration, tablets and capsules represent the most advantageous oral dosage unit form, in which case solid pharmaceutical carriers are obviously employed.
  • the pharmaceutical carrier will mainly comprise sterile water, although other ingredients may be included in order to improve solubility of the active ingredient.
  • Injectable solutions may be prepared for instance by using a pharmaceutical carrier comprising a saline solution, a glucose solution or a mixture of both. Injectable suspensions may also be prepared by using appropriate liquid carriers, suspending agents and the like.
  • the pharmaceutical carrier may optionally comprise a penetration enhancing agent and/or a suitable wetting agent, optionally combined with minor proportions of suitable additives which do not cause a significant deleterious effect to the skin. Said additives may be selected in order to facilitate administration of the active ingredient to the skin and/or be helpful for preparing the desired compositions.
  • These topical compositions may be administered in various ways, e.g., as a transdermal patch, a spot-on or an ointment. Addition salts of the compounds of formula (I), due to their increased water solubility over the corresponding base form, are obviously more suitable in the preparation of aqueous compositions.
  • Dosage unit form refers to physically discrete units suitable as unitary dosages, each unit containing a predetermined amount of active ingredient calculated to produce the desired therapeutic effect in association with the required pharmaceutical carrier.
  • dosage unit forms are tablets (including scored or coated tablets), capsules, pills, powder packets, wafers, injectable solutions or suspensions, teaspoonfuls, tablespoonfuls and the like, and segregated multiples thereof.
  • Liquid preparations for oral administration may take the form of e.g. solutions, syrups or suspensions, or they may be formulated as a dry product for admixture with water and/or another suitable liquid carrier before use.
  • Such liquid preparations may be prepared by conventional means, optionally with other pharmaceutically acceptable additives such as suspending agents (e.g. sorbitol syrup, methylcellulose, hydroxypropylmethylcellulose or hydrogenated edible fats), emulsifying agents (e.g. lecithin or acacia), non-aqueous carriers (e.g. almond oil, oily esters or ethyl alcohol), sweeteners, flavours, masking agents and preservatives (e.g. methyl or propyl p-hydroxybenzoates or sorbic acid).
  • suspending agents e.g. sorbitol syrup, methylcellulose, hydroxypropylmethylcellulose or hydrogenated edible fats
  • emulsifying agents e.g. lecithin or acacia
  • Pharmaceutically acceptable sweeteners useful in the pharmaceutical compositions of the invention comprise preferably at least one intense sweetener such as aspartame, acesulfame potassium, sodium cyclamate, alitame, a dihydrochalcone sweetener, monellin, stevioside sucralose (4,1′,6′-trichloro-4,1′,6′-trideoxygalactosucrose) or, preferably, saccharin, sodium or calcium saccharin, and optionally at least one bulk sweetener such as sorbitol, mannitol, fructose, sucrose, maltose, isomalt, glucose, hydrogenated glucose syrup, xylitol, caramel or honey.
  • intense sweetener such as aspartame, acesulfame potassium, sodium cyclamate, alitame, a dihydrochalcone sweetener, monellin, stevioside sucralose (4,1′,6′-trichloro-4,
  • Intense sweeteners are conveniently used in low concentrations.
  • concentration may range from about 0.04% to 0.1% (weight/volume) of the final formulation.
  • the bulk sweetener can effectively be used in larger concentrations ranging from about 10% to about 35%, preferably from about 10% to 15% (weight/volume).
  • the pharmaceutically acceptable flavours which can mask the bitter tasting ingredients in the low-dosage formulations are preferably fruit flavours such as cherry, raspberry, black currant or strawberry flavour. A combination of two flavours may yield very good results.
  • stronger pharmaceutically acceptable flavours may be required such as Caramel Chocolate, Mint Cool, Fantasy and the like.
  • Each flavour may be present in the final composition in a concentration ranging from about 0.05% to 1% (weight/volume). Combinations of said strong flavours are advantageously used.
  • a flavour is used that does not undergo any change or loss of taste and/or color under the circumstances of the formulation.
  • the biphenylcarboxamide compounds of this invention may be formulated for parenteral administration by injection, conveniently intravenous, intra-muscular or subcutaneous injection, for example by bolus injection or continuous intravenous infusion.
  • Formulations for injection may be presented in unit dosage form, e.g. in ampoules or multi-dose containers, including an added preservative. They may take such forms as suspensions, solutions or emulsions in oily or aqueous vehicles, and may contain formulating agents such as isotonizing, suspending, stabilizing and/or dispersing agents.
  • the active ingredient may be present in powder form for mixing with a suitable vehicle, e.g. sterile pyrogen-free water, before use.
  • biphenylcarboxamide compounds of this invention may also be formulated in rectal compositions such as suppositories or retention enemas, e.g. containing conventional suppository bases such as cocoa butter and/or other glycerides.
  • the biphenylcarboxamide compounds of this invention may be used in conjunction with other pharmaceutical agents, in particular the pharmaceutical compositions of the present invention may further comprise at least one additional lipid-lowering agent, thus leading to a so-called combination lipid-lowering therapy.
  • the said additional lipid-lowering agent may be, for instance, a known drug conventionally used for the management of hyperlipidaemia such as e.g. a bile acid sequestrant resin, a fibric acid derivative or nicotinic acid as previously mentioned in the background of the invention.
  • Suitable additional lipid-lowering agents also include other cholesterol biosynthesis inhibitors and cholesterol absorption inhibitors, especially HMG-CoA reductase inhibitors and HMG-CoA synthase inhibitors, HMG-CoA reductase gene expression inhibitors, CETP inhibitors, ACAT inhibitors, squalene synthetase inhibitors and the like.
  • HMG-CoA reductase inhibitor refers to a compound which inhibits the biotransformation of hydroxymethylglutaryl-coenzyme A to mevalonic acid as catalyzed by the enzyme HMG-CoA reductase. Such inhibition may be determined readily by one skilled in the art according to standard assays, i.e. Methods of Enzymology (1981) 71:455-509. Exemplary compounds are described e.g. in U.S. Pat. No. 4,231,938 (including lovastatin), U.S. Pat. No.
  • HMG-CoA synthase inhibitor refers to a compound which inhibits the biosynthesis of hydroxymethylglutaryl-coenzyme A from acetyl-coenzyme A and acetoacetyl-coenzyme A, catalyzed by the enzyme HMG-CoA synthase. Such inhibition may be determined readily by one skilled in the art according to standard assays, i.e. Methods of Enzymology (1985) 110:19-26. Exemplary compounds are described e.g. in U.S. Pat. No.
  • HMG-CoA reductase gene expression inhibitor may be used as the second compound in the combination therapy aspect of this invention.
  • These agents may be HMG-CoA reductase transcription inhibitors that block the transcription of DNA or translation inhibitors that prevent translation of mRNA coding for HMG-CoA reductase into protein.
  • Such inhibitors may either affect transcription or translation directly or may be biotransformed into compounds having the above-mentioned attributes by one or more enzymes in the cholesterol biosynthetic cascade or may lead to accumulation of a metabolite having the above-mentioned activities.
  • Such regulation may be determined readily by one skilled in the art according to standard assays, i.e. Methods of Enzymology (1985) 110:9-19. Exemplary compounds are described e.g. in U.S. Pat. No. 5,041,432 and E. I. Mercer, Prog. Lip. Res . (1993) 32:357-416.
  • CETP inhibitor refers to a compound which inhibits the cholesteryl ester transfer protein (CETP) mediated transport of various cholesteryl esters and triglycerides from HDL to LDL and VLDL.
  • CETP cholesteryl ester transfer protein
  • Exemplary compounds are described e.g. in U.S. Pat. No. 5,512,548, in J. Antibiot . (1996) 49(8):815-816 and Bioorg. Med. Chem. Lett . (1996) 6:1951-1954.
  • ACAT inhibitor refers to a compound which inhibits the intracellular esterification of dietary cholesterol by the enzyme acyl CoA:cholesterol acyltransferase. Such inhibition may be determined readily by one skilled in the art according to standard assays, i.e. the method of Heider et al., Journal of Lipid Research (1983) 24:1127. Exemplary compounds are described e.g. in U.S. Pat. No. 5,510,379, in WO 96/26948 and WO 96/10559.
  • squalene synthetase inhibitor refers to a compound which inhibits the condensation of two molecules of farnesylpyrophosphate to form squalene, catalyzed by the enzyme squalene synthetase. Such inhibition may be determined readily by one skilled in the art according to standard methods, i.e. Methods of Enzymology (1985) 110:359-373. Exemplary compounds are described e.g. in EP-0,567,026, in EP-0,645,378 and in EP-0,645,377.
  • a therapeutically effective dose will be from about 0.001 mg/kg to about 5 mg/kg of body weight, more preferably from about 0.01 mg/kg to about 0.5 mg/kg of body weight of the patient to be treated. It may be appropriate to administer the therapeutically effective dose in the form of two or more sub-doses at appropriate intervals throughout the day. Said sub-doses may be formulated as unit dosage forms, for example each containing from about 0.1 mg to about 350 mg, more particularly from about 1 to about 200 mg, of the active ingredient per unit dosage form.
  • the exact dosage and frequency of administration depends on the particular biphenylcarboxamide compound of formula (I) used, the particular condition being treated, the severity of the condition being treated, the age, weight and general physical condition of the particular patient as well as the other medication (including the above-mentioned additional lipid-lowering agents), the patient may be taking, as is well known to those skilled in the art. Furthermore, said effective daily amount may be lowered or increased depending on the response of the treated patient and/or depending on the evaluation of the physician prescribing the biphenylcarboxamide compounds of the instant invention. The effective daily amount ranges mentioned hereinabove are therefore only guidelines.
  • ACN stands for acetonitrile
  • THF stands for tetrahydrofuran
  • DCM stands for dichloromethane
  • DIPE diisopropylether
  • DMF means N,N-dimethylformamide
  • PyBOP means a complex of (T-4)-hexafluorophosphate( 1 ⁇ ) (1-hydroxy-1H-benzotriazolato-O)tri-1-pyrrolidinyl-phosphorus( 1+ ); and
  • DIPEA means diisopropylethylamine.
  • the residue was purified by column chromatography over silica gel (eluent: CH 2 Cl 2 /CH 3 OH 99.5/0.5). The product fractions were collected and the solvent was evaporated. The residue was dissolved in 2-propanol and DIPE and converted into the hydrochloric acid salt (1:1) with HCl/2-propanol.
  • the first fraction was further purified by high-performance liquid chromatography over RP BDS (Hyperprep C18 (100 ⁇ , 8 ⁇ m; eluent: [(0.5% NH 4 OAc in H 2 O)/CH 3 CN 90/10)]/CH 3 OH/CH 3 CN (0 min) 30/70/0, (24 min) 0/100/0, (24.01 min) 0/0/100, (32 min) 30/70/0) and crystallisation from 2-propanol, yielding (A)- ⁇ -phenyl-1-[4-[[[4′-(trifluoromethyl)[1,1′-biphenyl]-2-yl]carbonyl]amino]phenyl]-4-piperidineacetate (intermediate 25).
  • the second fraction was further purified by high-performance liquid chromatography over RP BDS (Hyperprep C18 (100 ⁇ , 8 ⁇ m; eluent: [(0.5% NH 4 OAc in H 2 O)/CH 3 CN 90/10)]/CH 3 OH/CH 3 CN (0 min) 30/70/0, (24 min) 0/100/0, (24.01 min) 0/0/100, (32 min) 30/70/0) and crystallisation from 2-propanol, yielding (B)- ⁇ -phenyl-1-[4-[[[4′-(trifluoromethyl)[1,1′-biphenyl]-2-yl]carbonyl]amino]phenyl]-4-piperidineacetate (intermediate 26).
  • Acetic acid, [[phenyl[4-[4-[[[[4′-(trifluoromethyl)[1,1′-biphenyl]-2-yl]carbonyl]-amino]phenyl]-1-piperazinyl]acetyl]amino]-(intm. 46) was prepared analogously by hydrolyzing compound (12) according to the method as described above.
  • Compound (13) was prepared analogously by reacting intermediate (14) with intermediate (44) using the method as described above.
  • Compound (15) was prepared analogously by reacting intermediate (10) with intermediate (44) using the method as described above.
  • Compound (16) was prepared analogously by reacting intermediate (14) with intermediate (43) using the method as described above.
  • Table F-1 lists the compounds that were prepared according to one of the above Examples. The following abbreviations were used in the tables: .C 3 H 8 O stands for the 2-propanolate salt.
  • HepG2 cells were cultured in 24-well plates in MEM Rega 3 containing 10% fetal calf serum. At 70% confluency, the medium was changed and the test compound or carrier (DMSO, 0.4% final concentration) was added. After 24 hours of incubation, the medium was transferred to Eppendorf tubes and cleared by centrifugation. A sheep antibody directed against either apoB was added to the supernatant and the mixture was kept at 8° C. for 24 hours. Then, rabbit anti-sheep antibody was added and the immune complex was allowed to precipitate for 24 hours at 8° C.
  • DMSO 0.4% final concentration
  • the immunoprecipitate was pelleted by centrifugation for 25 minutes at 1320 g and washed twice with a buffer containing 40 mM Mops, 40 mM NaH 2 PO 4 , 100 mM NaF, 0.2 mM DTT, 5 mM EDTA, 5 mM EGTA, 1% Triton-X-100, 0.5% sodium deoxycholate (DOC), 0.1% SDS, 0.2 ⁇ M leupeptin and 0.2 ⁇ M PMSF. Radioactivity in the pellet was quantified by liquid scintillation counting.
  • MTP activity was measured using an assay similar to one described by J. R. Wetterau and D. B. Zilversmit in Chemistry and Physics of Lipids, 38, 205-222 (1985).
  • To prepare the donor and acceptor vesicles the appropriate lipids in chloroform were put into a glass test tube and dried under a stream of N 2 .
  • Vesicles were then prepared by bath sonication (Branson 2200) at room temperature for maximum 15 min. Butylated hydroxytoluene was included in all vesicle preparations at a concentration of 0.1%.
  • the lipid transfer assay mixture contained donor vesicles (40 nmol phosphatidylcholine, 7.5 mol % of cardiolipin and 0.25 mol % glycerol tri[1- 14 C]-oleate), acceptor vesicles (240 nmol phosphatidylcholine) and 5 mg BSA in a total volume of 675 ⁇ l in a 1.5 ml microcentrifuge tube. Test compounds were added dissolved in DMSO (0.13% final concentration).
  • the reaction was started by the addition of MTP in 100 ⁇ l dialysis buffer.
  • the reaction was stopped by the addition of 400 ⁇ l DEAE-52 cellulose pre-equilibrated in 15 mM Tris-HCl pH 7.5, 1 mM EDTA, 0.02% NaN 3 (1:1, vol/vol).
  • the mixture was agitated for 4 min and centrifuged for 2 min at maximum speed in an Eppendorf centrifuge (4° C.) to pellet the DEAE-52-bound donor vesicles.
  • An aliquot of the supernatant containing the acceptor liposomes was counted and the [ 14 C]-counts were used to calculate the percent triglyceride transfer from donor to acceptor vesicles.

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